Amazon.com: Multi Option Pneumatic Solenoid Valve Block With Muffler Fitting Base Manifold 2/3/4/5/6 Row 3 Port (Color : 4 Row 6mm fitting, Size : DC12V) : Industrial & Scientific
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Amazon.com: Ridetech 31934001 RidePRO 4-way Solenoid/Air Valve Block used to Inflate and Deflate Air Spring Suspension Systems : Industrial & Scientific
Multi 2 ~ 20 Row 3V210-08 Electromagnetic Solenoid Valve Block With Muffler Fitting Base Manifold DC 12v 24v AC 110v 220v 3 port - AliExpress